Serving spoon



FIG. 1 is perspective view of a serving spoon showing my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a side elevation view thereof; and,

FIG. 4 is a bottom plan view thereof.

The broken line aspects herein are for the purpose of illustrating portions of the serving spoon and form no part of the claimed design. 

CLAIM The ornamental design for a serving spoon, as shown and described. 